Display screen with a graphical user interface



FIG. 1 is a front view of a first embodiment of a display screen with a graphical user interface showing my new design; and,

FIG. 2 is a front view of a second embodiment thereof.

The broken line showings of the display screen and portions of the graphical user interface are included for the purpose of illustrating environmental structure and form no part of the claimed design. 

CLAIM I claim the ornamental design for a display screen with a graphical user interface, as shown and described. 